Gov. Mike Kehoe of Missouri on Friday called a special legislative session to redraw congressional maps in his state to favor Republicans, becoming the first Republican-led state to follow Texas and join a push from the Trump administration to help the party keep control of the House in midterm elections.

He also called for the legislature to make it harder for state residents to pass citizen initiatives after Missouri voters approved measures deeply opposed by many of the state’s conservative politicians, like enshrining a right to abortion in the Missouri constitution.

“I’m calling for a special session on congressional redistricting and initiative petition reform to ensure our districts and Constitution truly reflect Missouri values,” Mr. Kehoe said. “This is about clarity for voters and ownership of our future.”

Mr. Kehoe and state Republican leaders want to carve out one more Republican seat by splitting Missouri’s Fifth Congressional District in Kansas City, a seat currently held by a veteran Democrat, Representative Emanuel Cleaver, over the objection of Democrats in the legislature. The map proposed by the governor on Friday, which he called “the Missouri First Map,” would crack the Fifth District apart while extending it into deeply Republican, and deeply rural, central Missouri.

Redistricting typically happens at the beginning of each decade, based on new census data that requires the reapportionment of House seats to match population shifts. But pressured by President Trump, Republicans are breaking with tradition. On Friday, Gov. Greg Abbott of Texas signed into law a new congressional map drawn to give Republicans as many as five new House seats. Indiana Republicans are considering their own redistricting push, as are Republican leaders in Florida.